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September 22, 2020, 03:03 |
Hull Simulation Gone Bad
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#1 |
New Member
Join Date: Sep 2020
Posts: 4
Rep Power: 6 |
Hello everyone.
It is my first steps to OpenFoam and CFD in general, after completing a cfd class doing my master's degree. I tried to simulate the flow around a hull and estimate the drag coefficient, using the DTS hull example and a wiggley hull example I located, however both without enough documentation. The boundary conditions are almost an exact copy of the examples, and I made sure that the alpha factor was correctly calculated in zero time. The mesh created using SALOME. The code succesfully compiled (interfoam, k-omega), but when postprossecing, i realized that the water was leaving the domain . I tried to attach some photos but unfortunately I was not able, so i included them in a google drive folder (https://drive.google.com/drive/folde...TF?usp=sharing). I also include the 0, constant and system folders. I suspect that the problem lies at inlet / outlet configuration. Please help a guy not give up just yet Thank you all and keep up the good work! |
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September 22, 2020, 10:05 |
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#2 |
New Member
Pedro Pacheco
Join Date: Dec 2019
Location: Portugal
Posts: 10
Rep Power: 6 |
Yannis, the link is not available...
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September 23, 2020, 04:48 |
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#3 |
New Member
Join Date: Sep 2020
Posts: 4
Rep Power: 6 |
I'm so sorry.
Please find below the active link. https://drive.google.com/drive/folde...TF?usp=sharing Thank you for your assistance once again! |
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September 23, 2020, 09:50 |
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#4 |
New Member
Pedro Pacheco
Join Date: Dec 2019
Location: Portugal
Posts: 10
Rep Power: 6 |
Yannis, it seems you have switched the inlet and outlet. This is what is causing your problem: you are setting the velocity in the inlet and intermal mesh to be (8.24 0 0) m/s but since the inlet is the furthest part of the domain along the x axis, the velocity is actually pointing out of the domain.
You can either switch back the inlet and outlet or just put a minus sign on your Umean. Hope this helps! |
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September 24, 2020, 06:58 |
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#5 |
New Member
Join Date: Sep 2020
Posts: 4
Rep Power: 6 |
ptpacheco thank you for your time!
I will check and revert as soon as possible! I hope you have a great day! |
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